Explanation of data types in this archive for "High sensitivity moment magnetometry with the quantum diamond microscope"

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Folder artificial_ferromagnetic_spherules

These are raw data files for the measurements done on the artificial ferromagnetic spherules as conducted by both the QDM and SQUID microscope. 

CIT_format_demag_seq contains the AF demagnetization sequences of a 1 T IRM.  These files are in the commonly used CIT format and can be viewed using the freely available Paleomag software:

http://cires1.colorado.edu/people/jones.craig/PMag3.html

The QDM folder contains data from: 

- The two AF demagnetization sequences of the 1 T IRM (/demag_sequence_1 and /demag_sequence_2)
- Measurements of an inclined and in-plane 1 T IRM at zero and larger liftoffs (/liftoff_tests)
- Tests of binning and upward continuation on the recovered dipole moment (/upward_continuation_tests and /binning_tests)

These the results of the liftoff, binning, and upward continuation tests are tabulated in Table 2 of the paper.  The cropping tests are not included here as they can be reproduced by cropping the 4x4 binned map included. 

Each folder contains data in the form of a Bz file in Matlab data format (Bz_uc0.mat).  These contain a data matrix with the Bz intensity values, a raster of the optical light image, and information about the pixel size and half-thickness of the NV layer (5 µm in all maps).  Bz maps are in units of teslas.  Finally, there is a raster image for each Bz field map (Bz_uc0_sat.png) set to the same color scale and optical map (LED.jpg).  Either of these images can be reconstructed using the data in the Bz_uc0.mat file

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Folder FOV3_backfield_sequence

This folder contains the data for the full (17 step) backfield IRM acquisition sequence performed on FOV 3 (oldest FOV).  Each folder contains the magnetic field map in the same field of view after application of the IRM strength and direction indicated in the folder name.  Note that the maps of the FOV are not precisely identical.  

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Folder full_transect

This folder contains the data for the abbreviated backfield experiment done for all three FOVs.  For each FOV, we applied an initial 1.5 T IRM in the down direction followed by 17 and 70 mT IRMs in the up direction. 

Also included are the Bz_profile_xxmT.txt files, which give the averaged Bz value (second column) at each x pixel coordinate (first column) across all three FOVs for the given IRM field step.  The averaged Bz value is the arithmetic mean of the Bz in a vertical column with the given x pixel coordinate.  The maps over which these profiles were computed have been cropped from the original maps to allow precise replication of mapped area at different field steps (see Fig. 1 in paper for the cropped maps).  Note that, due to overlap between the maps, there are two Bz values for a single x coordinate for a small fraction of x coordinates. 


